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Finding the Fourth Proportional to 79,929.60, 112,108.80 and 79,929.60

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Solution

The fourth proportional to 79,929.60, 112,108.80 and 79,929.60 is: 112,108.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,929.60 : 112,108.80 = 79,929.60 : x
  2. Step 2: Convert to fraction form
    79,929.60/112,108.80 = 79,929.60/x
  3. Step 3: Cross multiply
    79,929.60x = 112,108.80 × 79,929.60
  4. Step 4: Simplify right side
    79,929.60x = 8,960,811,540.48
  5. Step 5: Solve for x
    x = 8,960,811,540.48/79,929.60
  6. Step 6: Final answer
    x = 112,108.80

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.